The purpose of this study was to investigate barriers in WCEs project. Using randomized sampling method 104 WCEs were selected. Data was collected through a questionnaire. (Faced and content) Validity of the questionnaire was examined by a panel of Agricultural Extension Experts and Tehran university professors. Using Cronbach's-alpha formula the reliability of questionnaire assessed (a=0.93). Data analysis was performed using Factor analysis. The results showed that nine factors extracted and named as lack of professional understanding with explaining 16.5% of total variance and other factors were respectively: insufficient Education and Monitoring, Logistic (Supportive), organizational, Land-related problems, cultural- Economical, Personal, Consul tent's Expectation, and natural risks factors. As a whole, those factors explained 77.5% of the variance.